Openssl Generate Public Key From P12

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OpenSSL provides read different type of certificate and encoding formats. OpenSSL supports certificate formats like RSA, X509, PCKS12 etc. We will look how to read these certificate formats with OpenSSL.

  1. Openssl Generate Public Key From Private Key
  2. What Is Public Key
  3. Openssl P12 To Crt

Openssl Generate Public Key From Private Key

RSA is popular format use to create asymmetric key pairs those named public and private key. We can use rsa verb to read RSA private key with the following command.

What Is Public Key

We can see that the first line of command output provides RSA key ok

This article discusses how to generate a PKCS#12 private key and public certificate file that is suitable for use with HTTPS, FTPS, and the administrative port for EFT Server. Opensslbinopenssl.exe req -new -key -out -config C:Opensslbinopenssl.cnf-OR. Openssl req -out CSR.csr -new -newkey rsa:2048 -nodes -keyout privateKey.key will include your public key. This is mandatory as per the PKI process. The CSR, containing your entity information and the public key is sent to any Certificate Authority you like for a request of certificate (hence the CSR name).

Another case reading certificate with OpenSSL is reading and printing X509 certificates to the terminal. We will use x509 version with the following command.

X509 certificates also holds information about the purpose of the cerficate. This will be beneficial while using certificate to learn the creation aim of the certificate. We can print certificate purpose with the -purpose command like below.

In this article, we continue our series on SSL certificates, by introducing the PKCS12 Format and how to use it to create a KeyStore in OpenSSL. This module allows one to (re)generate OpenSSL public keys from their private keys. Keys are generated in PEM or OpenSSH format. The module can use the cryptography Python library, or the pyOpenSSL Python library. List of Various OpenSSL Commands and KeyTool that are used to check/generate CSR, Self Sign Certificate, Private key, convert CSR, convert certificate, etc. While Encrypting a File with a Password from the Command Line using OpenSSL is very useful in its own right, the real power of the OpenSSL library is its ability to support the use of public key cryptograph for encrypting or validating data in an unattended manner (where the password is not required to encrypt) is done with public keys. The Commands to Run.

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We can read and print web sites HTTPS certificates with the s_client verb which is explained in this tutorial. How many keys are generator 2 wheels worth. We can print the SSL/TLS X509 certificate with the following command.

We can also read and print PKCS12 files which can be used store keys and related information. We will use pkcs12 verb like below.

Certificate signing requests are used to create required request in order to sign our certificate from certificate authority. After creating a Certificate Signing Request we should check the CSR with the following command where we can see all information provided by CSR.

  • This module allows one to (re-)generate PKCS#12.

The below requirements are needed on the host that executes this module.

  • python-pyOpenSSL
ParameterChoices/DefaultsComments
action
string
    Choices:
  • parse
export or parse a PKCS#12.
attributes
string
The attributes the resulting file or directory should have.
To get supported flags look at the man page for chattr on the target system.
This string should contain the attributes in the same order as the one displayed by lsattr.
The = operator is assumed as default, otherwise + or - operators need to be included in the string.
backup
added in 2.8
    Choices:
  • yes
Create a backup file including a timestamp so you can get the original output file back if you overwrote it with a new one by accident.
certificate_path
path
The path to read certificates and private keys from.
force
    Choices:
  • no ←
  • yes
Should the file be regenerated even if it already exists.
friendly_name
string
Specifies the friendly name for the certificate and private key.
group
Name of the group that should own the file/directory, as would be fed to chown.
iter_size
integer
Default:
Number of times to repeat the encryption step.
maciter_size
integer
Default:
Number of times to repeat the MAC step.
mode
string
The permissions the resulting file or directory should have.
For those used to /usr/bin/chmod remember that modes are actually octal numbers. You must either add a leading zero so that Ansible's YAML parser knows it is an octal number (like 0644 or 01777) or quote it (like '644' or '1777') so Ansible receives a string and can do its own conversion from string into number.
Giving Ansible a number without following one of these rules will end up with a decimal number which will have unexpected results.
As of Ansible 1.8, the mode may be specified as a symbolic mode (for example, u+rwx or u=rw,g=r,o=r).
As of Ansible 2.6, the mode may also be the special string preserve.
When set to preserve the file will be given the same permissions as the source file.
other_certificates
list / elements=path
List of other certificates to include. Pre 2.8 this parameter was called ca_certificates
owner
Name of the user that should own the file/directory, as would be fed to chown.
passphrase
string
path
Filename to write the PKCS#12 file to.
privatekey_passphrase
string
Passphrase source to decrypt any input private keys with.
privatekey_path
path
selevelDefault:
's0'
This is the MLS/MCS attribute, sometimes known as the range.
When set to _default, it will use the level portion of the policy if available.
serole
string
When set to _default, it will use the role portion of the policy if available.
setype
string
When set to _default, it will use the type portion of the policy if available.
seuser
string
By default it uses the system policy, where applicable.
When set to _default, it will use the user portion of the policy if available.
src
path
state
    Choices:
  • absent
  • present ←
Whether the file should exist or not. All parameters except path are ignored when state is absent.
unsafe_writes
boolean
    Choices:
  • yes
Influence when to use atomic operation to prevent data corruption or inconsistent reads from the target file.
By default this module uses atomic operations to prevent data corruption or inconsistent reads from the target files, but sometimes systems are configured or just broken in ways that prevent this. One example is docker mounted files, which cannot be updated atomically from inside the container and can only be written in an unsafe manner.
This option allows Ansible to fall back to unsafe methods of updating files when atomic operations fail (however, it doesn't force Ansible to perform unsafe writes).
IMPORTANT! Unsafe writes are subject to race conditions and can lead to data corruption.

See also

openssl_certificate – Generate and/or check OpenSSL certificates
The official documentation on the openssl_certificate module.
openssl_csr – Generate OpenSSL Certificate Signing Request (CSR)
The official documentation on the openssl_csr module.
openssl_dhparam – Generate OpenSSL Diffie-Hellman Parameters
The official documentation on the openssl_dhparam module.
openssl_privatekey – Generate OpenSSL private keys
The official documentation on the openssl_privatekey module.
openssl_publickey – Generate an OpenSSL public key from its private key
The official documentation on the openssl_publickey module.

Common return values are documented here, the following are the fields unique to this module:

KeyReturnedDescription
backup_file
string
changed and if backup is yes
Sample:
filenamechanged or success
Path to the generate PKCS#12 file.

/opt/certs/ansible.p12
privatekey
string
changed or success
Path to the TLS/SSL private key the public key was generated from.

/etc/ssl/private/ansible.com.pem

  • This module is not guaranteed to have a backwards compatible interface. [preview]
  • This module is maintained by the Ansible Community. [community]

Authors¶

  • Guillaume Delpierre (@gdelpierre)

Hint

Openssl P12 To Crt

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